<template>
  <div class="upload-file">
    <el-upload multiple :action="uploadFileUrl" :before-upload="handleBeforeUpload" :file-list="fileList" :limit="limit"
      :on-error="handleUploadError" :on-exceed="handleExceed" :on-success="handleUploadSuccess" :show-file-list="false"
      :headers="headers" :class="onlyView ? 'upload-file-uploader' : 'upload-file-uploader-view'" ref="fileUpload">
      <!-- 上传按钮 -->
      <!-- <el-button type="primary">选取文件</el-button> -->

      <el-button v-if="onlyView">上传文件<el-icon>
          <Upload />
        </el-icon></el-button>
    </el-upload>
    <!-- 上传提示 -->
    <div class="el-upload__tip" v-if="showTip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
      </template>
      的文件
    </div>
    <div class="attachment-list">
      <div v-for="(file, index) in fileList" :key="file.id"
        :class="onlyView ? 'attachment-item' : 'attachment-item-view'">
        <div class="file-info">
          <el-icon class="file-icon">
            <component :is="getFileIcon(file)" />
          </el-icon>
          <span class="file-name">{{ getFileName(file) }}</span>
        </div>

        <div class="file-actions">
          <!-- <el-link type="primary" :underline="false" @click="handlePreview(file)" style='font-size: 12px;'>  
          预览
        </el-link> -->
          <el-link :href="`${baseUrl}${file.url}`" :underline="false" target="_blank" type="primary">
            <span class="el-icon-document"> 预览 </span>
          </el-link>
          <el-divider direction="vertical" />
          <el-link type="primary" :underline="false" @click="handleDelete(index)" style="font-size: 12px">
            删除
          </el-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { getToken } from "@/utils/auth";

import {
  Document,
  Picture,
  VideoPlay,
  Files,
} from "@element-plus/icons-vue";
const props = defineProps({
  modelValue: [String, Object, Array],
  modelName: [String, Object, Array],
  // 数量限制
  limit: {
    type: Number,
    default: 20,
  },
  isFileName: {
    type: Boolean,
    default: false,
  },
  // 是否只显示预览
  onlyView: {
    type: Boolean,
    default: true,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 5,
  },
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array,
    default: () => ["docx", "doc", "xls", "ppt", "txt", "pdf"],
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true,
  },
});
const getFileIcon = (file) => {
  let filePath = file.name || file.file;

  const ext = filePath?.split(".").pop()?.toLowerCase();
  const iconMap = {
    png: Picture,
    jpg: Picture,
    jpeg: Picture,
    gif: Picture,
    doc: Document,
    docx: Document,
    pdf: Files,
    xls: Document,
    xlsx: Document,
    mp4: VideoPlay,
    avi: VideoPlay,
  };
  return iconMap[ext] || Files;
};

const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const baseUrl = import.meta.env.VITE_APP_BASE_API;
// console.log(import.meta.env, "import.meta.env");
// console.log(baseUrl + "uploadFileUrl111111111");
const uploadFileUrl = ref(import.meta.env.VITE_APP_BASE_API + "/common/upload"); // 上传文件服务器地址
const headers = ref({ Authorization: "Bearer " + getToken() });
const fileList = ref([]);
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);

watch(
  () => props.modelValue,
  (val) => {
    if (val) {
      let temp = 1;
      // 首先将值转为数组
      const list = Array.isArray(val) ? val : props.modelValue.split(",");
      // 然后将数组转为对象数组
      fileList.value = list.map((item) => {
        if (typeof item === "string") {
          item = { name: item, url: item };
        }
        item.uid = item.uid || new Date().getTime() + temp++;
        return item;
      });
    } else {
      fileList.value = [];
      return [];
    }
  },
  { deep: true, immediate: true }
);

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  console.log(file, "file1");
  // 校检文件类型
  if (props.fileType.length) {
    const fileName = file.name.split(".");
    const fileExt = fileName[fileName.length - 1];
    const isTypeOk = props.fileType.indexOf(fileExt) >= 0;
    if (!isTypeOk) {
      proxy.$modal.msgError(
        `文件格式不正确，请上传${props.fileType.join("/")}格式文件!`
      );
      return false;
    }
  }
  // 校检文件名是否包含特殊字符
  if (file.name.includes(",")) {
    proxy.$modal.msgError("文件名不正确，不能包含英文逗号!");
    return false;
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  proxy.$modal.loading("正在上传文件，请稍候...");
  number.value++;
  return true;
}

// 文件个数超出
function handleExceed() {
  proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}

// 上传失败
function handleUploadError(err) {
  proxy.$modal.msgError("上传文件失败");
  setTimeout(() => {
    // proxy.$refs.fileUpload.handleRemove(file);
    proxy.$modal.closeLoading();
  }, 600);
}

// 上传成功回调
function handleUploadSuccess(res, file) {
  console.log(file, "file2");
  console.log(res, "res");
  if (res.code === 200) {
    if (props.isFileName) {
      uploadList.value.push({ name: res.fileName, url: res.fileName });
      console.log('isFileName',props.isFileName);

    } else {
      uploadList.value.push({ name: res.fileName, url: res.url });
    }
    // uploadList.value.push({ name: res.originalFilename, url: res.fileName });

    uploadedSuccessfully();
  } else {
    number.value--;
    proxy.$modal.closeLoading();
    proxy.$modal.msgError(res.msg);
    proxy.$refs.fileUpload.handleRemove(file);
    uploadedSuccessfully();
  }
}

// 删除文件
function handleDelete(index) {
  fileList.value.splice(index, 1);
  emit("delete", fileList.value);
}

// 上传结束处理
function uploadedSuccessfully() {
  if (number.value > 0 && uploadList.value.length === number.value) {
    console.log(fileList.value, "fileList.value,fileList.value");
    fileList.value = fileList.value
      .filter((f) => f.url !== undefined)
      .concat(uploadList.value);
    uploadList.value = [];
    number.value = 0;

    console.log(fileList.value, "fileListfileList");
    console.log(props.modelName, 'props.modelName')
    emit("update:modelValue", listToString(fileList.value), props.modelName);
    proxy.$modal.closeLoading();
  }
}

// 获取文件名称
function getFileName(file) {
  let name = file.name || file.file;
  console.log(name, "namenamename");

  // 如果是url那么取最后的名字 如果不是直接返回
  if (name.lastIndexOf("/") > -1) {
    let str = name.slice(name.lastIndexOf("/") + 1);
    let parts = str.split("_");
    let strName = parts[0] + "." + parts[parts.length - 1].split(".")[1];

    return strName;
  } else {
    return name;
  }
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if (list[i].url) {
      strs += list[i].url + separator;
    }
  }
  return strs != "" ? strs.substr(0, strs.length - 1) : "";
}
</script>

<style scoped lang="scss">
.upload-file-uploader {
  margin-bottom: 5px;
}

.upload-file-uploader-view {
  display: none;
}

.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}

.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}

.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}

.attachment-item-view {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  margin: 0 auto !important;
  background: #f5f7fa;
  border-radius: 4px;
  transition: background 0.3s;
  font-size: 12px;
}
</style>
